Book/Report

FZJ-2016-03821

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Bestrahlungsverhalten von beschichteten Brennstoffteilchen mit spaltproduktbindenden Kernadditiven

Förthmann, R. (Corresponding author)FZJ*

1979
Kernforschungsanlage Jülich, Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/11847

Report No.: Juel-1620

Abstract: The four irradiation experiments FRJ2-P17, FRJ2-P18, FRJ2-P19, and FRJ2-P20 for testing the efficiency of fission product-retaining kernel additives in coated fuel particles are described. The evaluation of the obtained experimental data led to the following results:- zirconia and alumina kernel additives are not suitable for an effective fission product retention in oxide fuel kernels,- alumina-silica kernel additives reduce the in-pile release of Sr 90 and Ba 140 from BISO-coated particles at temperatures of about 1200°C by two orders of magnitude, and the Cs release from kernels by one order of magnitude,- effective transport coefficients including all parameters which contribute to kernel release are given for (Th,U)O$_{2}$ mixed oxide kernels and low enriched UO$_{2}$ kernels containing 5 wt. % alumina-silica additives: log D$_{K}$/cm$^{2}$s$^{-1}$ = - $\frac{36028}{T}$ + 6,261 (Sr 90), log D$_{K}$/cm$^{2}$s$^{-1}$ = - $\frac{29646}{T}$ + 5,826(Cs134/137), -alumina-silica kernel additives are ineffective for retaining Ag 110 m in coated particles. However, also an intact SiC-interlayer was found not to be effective at temperatures above 1200 C.- the penetration of the buffer layer by fission product containing eutectic additive melt during irradiation can be avoided by using additives which consist of alumina and mullite without an excess of silica,- annealing of LASER-failed irradiated particles and the irradiation test FRJ2-P20 indicate that the efficiency of alumina-silica kernel additives is not altered if the coating becomes defect.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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